MIC2193

更新时间： 2024-01-25 01:21:53

品牌	Logo	应用领域
麦瑞 - MICREL		/
页数	文件大小	规格书
10页	65K
描述
400KHZ SO 8 SYNCHRONOUS BUCK CONTROL IC

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MIC2193

Micrel

MIC2193

400kHz SO-8 Synchronous Buck Control IC

General Description

Features

Micrel’s MIC2193 is a high efficiency, PWM synchronous

buck control IC housed in the SO-8 package. Its 2.9V to 14V

input voltage range allows it to efficiently step down voltages

in 3.3V, 5V, and 12V systems as well as 1- or 2-cell Li Ion

battery powered applications.

• 2.9V to 14V input voltage range

• 400kHz oscillator frequency

• PWM current mode control

• 100% maximum duty cycle

• Front edge blanking

• 4Ω output drivers

The MIC2193 solution saves valuable board space. The

device is housed in the space-saving SO-8 package, whose

low pin-count minimizes external components. Its 400kHz

PWM operation allows a small inductor and small output

capacitors to be used. The MIC2193 can implement all-

ceramic capacitor solutions.

• Cycle-by-cycle current limiting

• Frequency foldback short circuit protection

• 8 lead SOIC package

Applications

• Point of load power supplies

• Distributed power systems

• Wireless Modems

• ADSL line cards

• Servers

The MIC2193 drives a high-side P-channel MOSFET, elimi-

natingtheneedforhigh-sideboot-strapcircuitry. Thisfeature

allows the MIC2193 to achieve maximum duty cycles of

100%, which can be useful in low headroom applications. A

low output driver impedance of 4Ω allows the MIC2193 to

drive large external MOSFETs to generate a wide range of

output currents.

• Step down conversion in 3.3V, 5V, and 12V systems

• 1-and 2-cell Li Ion battery operated equipment

The MIC2193 is available in an 8 pin SOIC package with a

junction temperature range of –40°C to +125°C.

Typical Application

V_IN

3.3V

0.012Ω

120µF

6.3V

(×2)

MIC2193BM

Si9803

(×2)

VIN

V_OUT

1.8V, 5A

3.8µH

VDD OUTP

COMP OUTN

Si9804

(×2)

10k

220µF

6.3V

(×2)

1µF

GND

2.2nF

22.6k

Adjustable Output Synchronous Buck Converter

Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

April 2004

M9999-042704

12 3 4 5 6 7...10

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